Phase switch: scope and features. Which phase switch is better to choose: automatic or manual. Installation parameters of an automatic phase switch for a three-phase network.

Three-key switch: design features and installation procedure. Three-key switch connection diagram for three bulbs. Connection of wires to the three-key switch. Features of installing a three-button switch through a junction box.

LED lamp power: converts the power of a conventional lamp to LED. How to calculate the optimal power of LED lamps for different rooms. Comparison of the power of LED lamps and incandescent lamps: why such a difference.

Time relay: operating principle, setting, functions, design and connection. Varieties of time relays: with electromagnetic or pneumatic deceleration, with a clock or anchor mechanism. Adjustment of devices with a digital scale.

RCD connection diagram in a single-phase network with grounding in a private house. How to connect an RCD to a single-phase network without grounding. The principle of constructing an RCD connection diagram. Will protection work without grounding?

Category D circuit-breaker characteristic: differences between categories. Descriptions and features of the operation of circuit breakers of different classes. Advantages and disadvantages of machines of different categories.

Single key switch: for flush or open wiring, IP20, IP44 and IP54. Technical characteristics of bipolar single-key switches. How to connect a single-key switch with backlight.

Heat-resistant wire: up to 400 degrees, single-core and with heat-resistant insulation. How to choose a heat-resistant wire, depending on the purpose. What maximum temperature can heat-resistant insulation for wires withstand?

Wireless switch: operating principle, wiring diagram. Programming and reprogramming of proximity switches. What you need to pay attention to when choosing a wireless switch.

Electrical panel: built-in, outdoor, metal and low current. Varieties of apartment electrical panels. Classification of distribution switchboards: according to purpose, materials of manufacture and place of installation.

Home energy storage in the event of a power outage. How long can an energy storage device work autonomously. What you need to pay attention to when choosing an uninterruptible system for a private house or apartment.